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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Basic Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Multiplex PCR,Resistance,Plasmid,Carbapenemase,Cephalosporines
- چکیده:
- چکیده انگلیسی: Objective(s): Resistance to carbapenems as the last line for controlling resistant bacteria is increasing due to production of carbapenemase. The aim of this study was to detect the plasmid-encoded carbapenemases using phenotypic methods and multiplex PCR among the multi-drug resistant (MDR) isolates from patients with urinary tract infection (UTI) in northern Iran.
Materials and Methods: Antimicrobial susceptibility testing and extended spectrum β-lactamase (ESBL) production test were performed for 91 MDR Escherichia coli strains by disc diffusion and double disk synergy tests (DDST), respectively. Carbapenemases production was confirmed using Hodge test, EDTA double disk synergy test (EDST) and combined disk test (CDT). The isolates were subjected to PCR targeting blaIMP, blaVIM, blaKPC and blaOXA-48 β-Lactamase genes.
Results: Resistance of isolates to 1st, 2nd, 3rd, and 4th generations of cephalosporins, carbapenems, and penicillins were 73%, 84.5%, 62%, 37.5%, 17.5%, and 76%, respectively. Based on CDT and Hodge test, 1 (3%) and based on EDST, 2 (6%) of 33 ESBL producers synthesize a type of carbapenemase. The frequency of blaIMP, blaVIM, blaKPC, and blaOXA-48 genes was 8.7%, 9.8%, 2.1%, and 15.3%, respectively. Existence of blaIMP conferred more resistance to cephalotin, fosfomycin, and piperacillin (P≤0.01) and carrying blaVIM caused more resistance to cephalotin, cefepime, and ceftazidime (P≤0.01). The presence of blaKPC conferred more resistance to cephalotin and presence of blaOXA-48 caused more resistance to chloramphenicol and piperacillin (P≤0.05).
Conclusion: Identification and controlling of this nearly low frequent ESBL and carbapenemase producing strains are important due to the presence of plasmid genes encoding carbapenemase.- انتشار مقاله: 09-06-1397
- نویسندگان: Mahshid Deldar Abad Paskeh,Mohammad Javad Mehdipour Moghaddam,Zivar Salehi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Basic Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Multiplex PCR,Resistance,Plasmid,Carbapenemase,Cephalosporines
- چکیده:
- چکیده انگلیسی: Objective(s): Resistance to carbapenems as the last line for controlling resistant bacteria is increasing due to production of carbapenemase. The aim of this study was to detect the plasmid-encoded carbapenemases using phenotypic methods and multiplex PCR among the multi-drug resistant (MDR) isolates from patients with urinary tract infection (UTI) in northern Iran.
Materials and Methods: Antimicrobial susceptibility testing and extended spectrum β-lactamase (ESBL) production test were performed for 91 MDR Escherichia coli strains by disc diffusion and double disk synergy tests (DDST), respectively. Carbapenemases production was confirmed using Hodge test, EDTA double disk synergy test (EDST) and combined disk test (CDT). The isolates were subjected to PCR targeting blaIMP, blaVIM, blaKPC and blaOXA-48 β-Lactamase genes.
Results: Resistance of isolates to 1st, 2nd, 3rd, and 4th generations of cephalosporins, carbapenems, and penicillins were 73%, 84.5%, 62%, 37.5%, 17.5%, and 76%, respectively. Based on CDT and Hodge test, 1 (3%) and based on EDST, 2 (6%) of 33 ESBL producers synthesize a type of carbapenemase. The frequency of blaIMP, blaVIM, blaKPC, and blaOXA-48 genes was 8.7%, 9.8%, 2.1%, and 15.3%, respectively. Existence of blaIMP conferred more resistance to cephalotin, fosfomycin, and piperacillin (P≤0.01) and carrying blaVIM caused more resistance to cephalotin, cefepime, and ceftazidime (P≤0.01). The presence of blaKPC conferred more resistance to cephalotin and presence of blaOXA-48 caused more resistance to chloramphenicol and piperacillin (P≤0.05).
Conclusion: Identification and controlling of this nearly low frequent ESBL and carbapenemase producing strains are important due to the presence of plasmid genes encoding carbapenemase.- انتشار مقاله: 09-06-1397
- نویسندگان: Mahshid Deldar Abad Paskeh,Mohammad Javad Mehdipour Moghaddam,Zivar Salehi
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Breast cancer,gene polymorphism,lncRNA,GAS5,Genetic variation
- چکیده:
- چکیده انگلیسی: Long non-coding RNAs (lncRNAs) are RNA molecules (>200 nucleotides in length) with no protein-coding capacity. Recent studies have demonstrated that lncRNAs involve in the regulation of their target genes at transcriptional, post-transcriptional and epigenetic levels. The aim of this case-control study was to explore whether growth arrest-specific 5 (GAS5) lncRNA 5-bp Ins/Del (rs145204276) polymorphism is involved in the breast cancer susceptibility. A total of 170 cases and 220 age matched controls were recruited in this study. GAS5 lncRNA polymorphism was genotyped using tetra primers amplification refractory mutation system polymerase chain reaction (T-ARMS-PCR) method. Statistical analysis was performed using SPSS. The distribution of the genotype ins/ins, ins/del and del/del were %75.29, 21.76% and 2.94% and 52.27%, 39.55% and 8.81% in the cases and controls, respectively. The ins/del or del/del genotype had a significantly decreased risk of breast cancer as compared with the ins/ins genotype under a codominant model (OR=0.38, 95%CI 0.24-0.60, p=0.0001; OR= 0.25, 95%CI 0.09-0.69, p=0.008, respectively). Moreover, the deletion allele of this polymorphic site is associated with a protective effect (OR=0.41, 95%CI 0.28-0.60, p=0.0001). Our study provided the first evidence that the deletion allele of GAS5 rs145204276 may have a protective role in mediating individual susceptibility to breast cancer. However, further comprehensive studies are warranted in a larger sample.
- انتشار مقاله: 22-08-1397
- نویسندگان: Rafat Sharifi,S Shirin Shahangian,Zivar Salehi,Farhad Mashayekhi,Soheila Talesh Sasani,Laleh Mirzanezhad
- مشاهده